Electric forge



July 5 1927. 1,6 4,365

6. A. E. JONES ELECTRIC FORGE Filed Dec. 20 1920 ILL 31 PL 43 [3/ 42 ,3] III 47 Gear 6 88, WW Ji Patented July 5, 1927. j 1' r ommun st roun er nnwcnomiomconnnctrrcuirrif EcTItic 1130 63." v

iliipiie t i'bn fled becehlterfgo; 19 12 0. cellulite, ii 31,

"age are passed. through rivets'jor other arti-' 6' cles for raising I or other working temperature. I

invention relates more particularly to e ectric ,forgesor, similar "apparatus for,

fpassing a heavy electric cdrrent through metal for heating the same to forging or welding heatfand in the preferred form shown herewith may be used for riveting together elements of structural steel or boilers and 'for other'purposes: i My inventin consists essenti ple, easily operated, efiicient'apparatus of y inventionconsists; more particularly in the combination of yieldably positioned separately mova'ble electrodes and an adjust able bridging connector or 'COIldUOtHlg plece p and with collars 19 fast on the intermediate near said electrodes,'and ii source of current having its poles connected to saidjelectrodes" respectively; tl oughhs shown in the appended claims, the scope of the invent on is not so limited, whereby the ,heetingof the rexiiliired articles is doneyin series.

" y invention consists, 3150,41; the comb1- 3 nation with any suitable means for holding the metal'tobe operatedupon, of,su1table; H I p p p 1 to 3," an inverted y-"shaped bracket24ldisconnecting deviees fbrfpassing fhesvy "elec trio-currentsthroughmhe' same; and Ineensf ffor adjusting the; electrodes forfreceivmg V p I p I I ner face with vertical guides 26freceiving85 v Otheriobjects'oftli e. jnventionw illiappear articles of difierntisi zes. I

as the description'proceeds and while hereeu in I minute' details V or the invention are describedy'the invention isnotflimited to these,

since many andvsrious changes maybe made without dqigrting from the Scope of the invention as irne p v In the accompaiiying drawmgs show ng by way of exam leptwioiof manypossihle embodiments oft eiinventiony 'Figure- 1 shows 111- "perspective an appa if m- 9 my nven mw he tothe desired 'hi'gh heat Fig. 6fshows adiegram of "the electrical connections ofjtheapparatus forge areisho'w'n, mounted one rectangular frame "10" comprising horizontal. front cross fpieces'll provided With bearing pieces 12 the kind above described Which'is'offgreat'; portability and readily adaptable vfor'rods;

J rivets rother articles of varying sizes and vtherefrom. 4

ratus constructed in aceordance With Fig- "Q isfe front'elevation of a deteilof" Fig.3 shows s th'e detail of Fig. 2; Fig.4 s a front[elevation of at detail of an apparatus constructed in accordance with (another form of my invention;

{Fig 5"'s"afp1an ofthedetail of Fi '3; and v iso .c 5

I p p various elements of my improved thereon'heving vertical bearing bores therell wasvvivel Castor 16. p p v p v A pair of electrode-carrying spindlesl7 areislidable in "said boresfan arezpllovided" I Vltl'lifOO t'fd edals 18 jatfthelower ends of saidfspind es for depressing I the 'spindles,

parrot the spindles, Coiled-SpringsQOon said fspindles"compressed between said col-[1s metallic'electrodes Ql'are fiXGClfOII theupper 7 ends of said spindles 51md-'suita loly I insulated In'the form of invention shown in Figs. 1

posed shove "said electrodes has its 'arms'25j fixed to said frame and provided on the in- "sulated from gs'ziid'bzir and disposed over said electrodes 21." A horizontal shaft 32 rotatable in bearing brackets fixed on said grins 25 carries a fcrank ha-ndle33 andfpinio'n's 34,

the latter en'gaging vertical racks v35 secured t t eend 1 id r Wh reb 'ofi t 'wi i of -thef crank eama adjust'tlie he'iglltbfSaid I piece 31 under a moderate pressure.

nected to points in said primarycoil; and a pivoted switch blade l5 is adapted to engage any one of said contacts. Afitllttlble source of current d6 has one pole 47 connected to said blade &5 and the other pole l8 connectedto one end .49 of said primary coil 41. i

In the form of invention shown in Figs. 4

and 5, theinverted U-shaped bracket 5% has its yoke 55 provided with openings near the ends thereof. Bearing brackets 56 and 57 are fixed on said yoke, the former being provided with horizontal bearing openings 58 and the latter with vertical bearing bores 59, the latter registering with said openings of the yoke 55. Vertical spindles 60 are disposed in said vertical bores 59 and have threaded lower portions 61 and are held against upward displacement by collars 62 engaging under said yoke. orin wheels 65 (Fig. 4) are provided on the upper end of said spindles and rest on said bearing brackets 57. The horizontal supporting bar 66 provided with threaded end openings 67 received on the threaded portion 61 of said spindles, carries the bridging connector or conducting piece 31 secured to and'insulated from its under face. A horizontal shaft 68 in said horizontal bearing openings 58 carries a crank handle 69, and'worms 70 .engaging said worm wheels 65, whereby rotationot the crank 69 may vertically adjust the height of said bridging connector 31, in order to receivethe rivets or other articles of different lengths.

In operating the apparatus the conducting piece 31 is adjusted to the height of the rivet or other metal piece, by means of the crank handle so that the rivet may be in contact with the bridging connector or conducting The foot pedals are then pressed one at a time and the rivet inserted as shown in Fig. l betorethe pedal is released. The switch is then closed with the blade 45 engaging the right contact at to put on the right amount of current, which, passing through one elec: trode, one rivet, the bridging connector 31, the other rivet and other electrode heatsthe rivets to the required temperature. The rivet is then grasped with tongs or. otherwise and removed as the foot pedal is stepped upon. New rivets may be inserted by the reverse operation without cutting oil the current. As is well understood in the electric art, many other processes other than the above described may be accomplished by my new apparatus.

Having thus described my invention, I claim:

1. In arivet heating machine, the combination with a frame, of a transformer mounted in saidt'rame and having an open circuit secondary winding, flexible conductors forming the ends of said secondary winding, two spindlesvertically slidable in said frame, an electrode at the upper end of each spindle and connected to the free end of one of said flexible conductors, two

vertically extending supports, a vertically extending rack slidably mounted on each support, a support extending upwardly from said frame, a shaft mount-ed in said frame, a pair of gears on said shaft, each in mesh with one of said racks, a bridging conductor insulated from and secured to said racks and extending horizontally above both of said electrodes, means for actuating said shaft to adjust the position of said bridging conductor, springs for normally maintaining said spindles and electrodes in raised position, toot pedals at the lower ends of said spindles ,to be engaged to depress said electrodes in opposition to the tension of said springs into position for receiving rivets between the electrodes and said bridging conductor, the springs,-when the foot pedals are released, urging the electrodes upward to clamp the rivets between them and the bridging conductor. I i

2. In a rivet heating machine. the combination with a ira1ne,ot a transformer mounted in said frame and having an open circuit secondary winding, flexible conductors forming the ends of said secondary winding. two

spindles vertically slidable in said f ame, an electrode at the upper end of each spindle and connected to the free end of one of said flexible conductors and having a plane horizontal rivet engaging face, a U-shaped bracket on the top of said frame, a bridging conductor vertically slidable therein, having a plane horizontal rivet engaging face, and

. extending above the upper ends of said electrodes, means for controlling the vertical position of said bridging conductor, springs for normally maintaining said spindles and electrodes in raised position to clamp rivets between them and the bridging conductor at position above the upper level of the frame, and means for depressing said spindles in opposition to the tensionof said springs to release the rivets disposed between said electrodes and bridging conductor.

3. In arivetheating machine, the combination with a frame, or a transformer mounted in said frame and having an open circuit secondary winding, flexible conduc- Hit! tors forming the ends of said secondary winding, two spindles vertically slidable in said frame, an electrode at the upper end of each spindle and connected to the free end of one of said flexible conductors and having an upper plane horizontal rivet engaging face, a bridging conductor slidably mounted in a vertical direction on said frame above the upper ends of said electrodes and having W a lower plane horizontal rivet engaging face,

trodes.

GEORGE A. E. JONES, 

